70 dart 470 ci drag car build.

More shim. Move the pinion deeper into the ring gear. From my experience, d60's usually have .035 to .055 under the race, unless it was a very old housing. Richmond's sometimes have a weird pattern but that is really on the outside of the tooth.
Okay thanks, what was in behind the pinion was about .055 when I pulled it. It's old 69 B-body housing